<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.4.1
 * @filesource
 */
defined('BASEPATH') or exit('No direct script access allowed');

/**
 * oci8 Result Class
 *
 * This class extends the parent result class: CI_DB_result
 *
 * @category Database
 * @author EllisLab Dev Team
 * @link https://codeigniter.com/user_guide/database/
 */
class CI_DB_oci8_result extends CI_DB_result
{

    /**
     * Statement ID
     *
     * @var resource
     */
    public $stmt_id;

    /**
     * Cursor ID
     *
     * @var resource
     */
    public $curs_id;

    /**
     * Limit used flag
     *
     * @var bool
     */
    public $limit_used;

    /**
     * Commit mode flag
     *
     * @var int
     */
    public $commit_mode;
    
    // --------------------------------------------------------------------
    
    /**
     * Class constructor
     *
     * @param
     *            object &$driver_object
     * @return void
     */
    public function __construct(&$driver_object)
    {
        parent::__construct($driver_object);
        
        $this->stmt_id = $driver_object->stmt_id;
        $this->curs_id = $driver_object->curs_id;
        $this->limit_used = $driver_object->limit_used;
        $this->commit_mode = & $driver_object->commit_mode;
        $driver_object->stmt_id = FALSE;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Number of fields in the result set
     *
     * @return int
     */
    public function num_fields()
    {
        $count = oci_num_fields($this->stmt_id);
        
        // if we used a limit we subtract it
        return ($this->limit_used) ? $count - 1 : $count;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Fetch Field Names
     *
     * Generates an array of column names
     *
     * @return array
     */
    public function list_fields()
    {
        $field_names = array();
        for ($c = 1, $fieldCount = $this->num_fields(); $c <= $fieldCount; $c ++) {
            $field_names[] = oci_field_name($this->stmt_id, $c);
        }
        return $field_names;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Field data
     *
     * Generates an array of objects containing field meta-data
     *
     * @return array
     */
    public function field_data()
    {
        $retval = array();
        for ($c = 1, $fieldCount = $this->num_fields(); $c <= $fieldCount; $c ++) {
            $F = new stdClass();
            $F->name = oci_field_name($this->stmt_id, $c);
            $F->type = oci_field_type($this->stmt_id, $c);
            $F->max_length = oci_field_size($this->stmt_id, $c);
            
            $retval[] = $F;
        }
        
        return $retval;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Free the result
     *
     * @return void
     */
    public function free_result()
    {
        if (is_resource($this->result_id)) {
            oci_free_statement($this->result_id);
            $this->result_id = FALSE;
        }
        
        if (is_resource($this->stmt_id)) {
            oci_free_statement($this->stmt_id);
        }
        
        if (is_resource($this->curs_id)) {
            oci_cancel($this->curs_id);
            $this->curs_id = NULL;
        }
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Result - associative array
     *
     * Returns the result set as an array
     *
     * @return array
     */
    protected function _fetch_assoc()
    {
        $id = ($this->curs_id) ? $this->curs_id : $this->stmt_id;
        return oci_fetch_assoc($id);
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Result - object
     *
     * Returns the result set as an object
     *
     * @param string $class_name            
     * @return object
     */
    protected function _fetch_object($class_name = 'stdClass')
    {
        $row = ($this->curs_id) ? oci_fetch_object($this->curs_id) : oci_fetch_object($this->stmt_id);
        
        if ($class_name === 'stdClass' or ! $row) {
            return $row;
        }
        
        $class_name = new $class_name();
        foreach ($row as $key => $value) {
            $class_name->$key = $value;
        }
        
        return $class_name;
    }
}
